java-bindings: Changes per review comments

- Add function to check if DirectBuffer queries are enabled.
- Javadoc comment fixes
- Fix min buffer limits.

bindings/java/src/main/com/apple/foundationdb/DirectBufferPool.java

@@ -35,7 +35,7 @@ class DirectBufferPool {
 	// is always greater than the maximum size KV allowed by FDB.
 	// Current limits is :
 	//     10kB for key + 100kB for value + 1 int for count + 1 int for more + 2 int for KV size
-	static public final int MIN_BUFFER_SIZE = (10 + 100) * 1024 + Integer.BYTES * 4;
+	static public final int MIN_BUFFER_SIZE = (10 + 100) * 1000 + Integer.BYTES * 4;
 
 	static private final int DEFAULT_NUM_BUFFERS = 128;
 	static private final int DEFAULT_BUFFER_SIZE = 1024 * 512;
@@ -66,14 +66,14 @@ class DirectBufferPool {
 	}
 
 	/**
-	 * Requests a {@link #DirectByteBuffer} from our pool. Returns null if pool is empty.
+	 * Requests a {@link DirectByteBuffer} from our pool. Returns null if pool is empty.
 	 */
 	public synchronized ByteBuffer poll() {
 		return buffers.poll();
 	}
 
 	/**
-	 * Returns the {@link #DirectByteBuffer} that was borrowed from our pool. This
+	 * Returns the {@link DirectByteBuffer} that was borrowed from our pool. This
 	 * is non-blocking as it was borrowed from this pool.
 	 */
 	public synchronized void add(ByteBuffer buffer) {

bindings/java/src/main/com/apple/foundationdb/FDB.java

@@ -85,7 +85,7 @@ public class FDB {
 	private volatile boolean netStarted = false;
 	private volatile boolean netStopped = false;
 	volatile boolean warnOnUnclosed = true;
-	protected boolean enableDirectBufferQueries = false;
+	private boolean enableDirectBufferQueries = false;
 
 	private boolean useShutdownHook = true;
 	private Thread shutdownHook;
@@ -240,6 +240,16 @@ public class FDB {
 		enableDirectBufferQueries = enabled;
 	}
 
+	/**
+	 * Determines whether getRange() queries can use {@link DirectByteBuffer} from
+	 * {@link DirectBufferPool} to copy results.
+	 *
+	 * @return {@code true} if an enabled has been selected and {@code false} otherwise
+	 */
+	public boolean isDirectBufferQueriesEnabled() {
+		return enableDirectBufferQueries;
+	}
+
 	/**
 	 * Resizes the DirectBufferPool with given parameters, which is used by getRange() requests.
 	 *

bindings/java/src/main/com/apple/foundationdb/FDBTransaction.java

@@ -373,7 +373,7 @@ class FDBTransaction extends NativeObjectWrapper implements Transaction, OptionC
 				Transaction_getRange(getPtr(), begin.getKey(), begin.orEqual(), begin.getOffset(),
 									 end.getKey(), end.orEqual(), end.getOffset(), rowLimit, targetBytes,
 									 streamingMode, iteration, isSnapshot, reverse),
-				FDB.instance().enableDirectBufferQueries, executor);
+				FDB.instance().isDirectBufferQueriesEnabled(), executor);
 		} finally {
 			pointerReadLock.unlock();
 		}